The Goonies was the first movie I ever saw more than once in the theater. I actually saw it three times in the theaters in the summer of '85. And we were heavy into playing D&D at the time, as I'd gotten my Mentzer Basic Set as a birthday present in December of '84.
Somehow, though, it took me until at least '87 or '88, when I had the Companion Set, to finally draw up One Eyed Willy's caves as a dungeon. Don't know what took me so long. Anyway, here are a couple scans of the dungeon. I don't know where the Fratelli family's stats are. I made Ma a Magic-User and the brothers Thieves, but other than that I don't remember.
The adventure notes are keyed on the maps, but they're in pencil and 20+ years old, so sorry if they're a bit hard to read. Fans of the movie should enjoy them, though!